Clay,
I've found AVG Free has gotten a little 'bloated', so I've switched to Avira AntiVir Personal which is free as well.
It has an annoying pop-up screen, but luckily it can easily be disabled.
I'm not even sure why I still use an antivirus at all, I haven't had a hit on anything in so long I can't remember the last time it happened. Just a force of Windows habit I guess.